Abstract
Objective: To assess the influence of preheating on microhardness and surface roughness of nanoceramic resin composite.
Methods: Twenty-eight disc-shaped specimens of nanoceramic resin composite Ceram X Duo (Dents ply De Trey, Konstanz, Germany) were made using a mold and then randomly assigned into two groups (with and without preheating where n=20). Each group was subdivided according to the test into two subgroups (n=10). Vickers hardness measurements for the top and bottom surfaces of the specimens were evaluated by tester machine and surface Roughness (Ra) was assessed using the Atomic Force Microscope.
Results: Results of both tests showed no significant difference among specimens either preheated or not. Nevertheless, microhardness results revealed significant difference if top surfaces compared to the bottom ones either the specimens were preheated or not. Surface roughness results exhibited no significant difference among the preheated and non-preheated specimens.
Conclusion: Preheating had a certain effect on the mechanical and surface properties of nanoceramic resin composite.
Keywords: preheating; nanoceramic composite; microhardness; surface roughness
Clinical significance: Preheating can be clinically beneficial for promoting the manipulation, marginal sealing, and surface features of nanoceramic resin composite.